I've had a PRS650 for about ten months and this has just appeared on the screen. The unit is kept and used only in my bedroom, has been in a leather cover since pretty much day one and has never been dropped or anything so I can't figure out how this has happened.
It's really difficult to get a proper photo but to the eye it looks like the centre blob is on a higher level to the two others (which are slightly fainter), if that makes any sense.
Has anyone had something similar and can it happen spontaneously or what could the cause be ?
Thanks !